Albumin-iron-phosphorus compounds and a process of making same.



UNITED ST WENT OFFICE, V, V

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ALBUMIN-IRON-PHOBPHORUS (YOIIPOUNDSi AND A 19313033!v 6F MAKING SAME.

80 Drawing.

Specification of Letters Patent.

Applioatien filed June 20, 1912. Serial No. 704,800.

Patented Sept. 9, 1913.

pounds and a Process of Making Same, of Y which the following is a full, clear, and exactspecification.

From the United States Letters Patent No. 754,803, dated March 15, 1904:, it is ap- V producing soluble iron salts for even from solutions which are powerfully acid to congo the inositephosphoric acid is, recipitated as an insoluble normal iron salt y addition of ferric chlorid. By filtering such a precipitate and drying it there is obtained a powder which is very resistant to chemical attack and is on this account therapeutically valueless, since it passes through the digestive track unchanged. view of the high therapeutic value attaching to the simultaneous use of inositephosphoric acid and iron it is desirable to find the term of the iron Y salt both components of which are easily resorbed.

The present invention achieves this causing iron salts to act upon the organic phosphorus compound free acid or its alkali or alkaline earth salts in resence of albumin in such a manner that t e albumin is at the same time precipitated so that the iron-salts of the organic phosphorus compound arcad- 'sorbed in the albumin. The iron salt thus obtained exhibits colloidal properties and retains them even after-filtration and drying.

When such a colloidal albuminiron precipitate is subjected to artificial gastric digestion, the iron salt of the inositegihosphoric acid remains in a so finely divide form that it runs through even the thickest filter and does not settle even after long standing. If the acid suspension is brought by means of which should still be acid in reaction, there sodium carbonate to the degree of alkalinity of the intestine, the. iron salt dissolves completely at 37 C. after standing for about two hours. These conditions are. the most favorable that can be conceived for the resorption of both components. 7

. The invention is illustrated by the'follo'wmg example:

Example I: 160 parts of casein are stirred with 20 times thelr weight of water and dissolved by means of 26 parts by volume of caustic soda lye of 30 per cent. strength. This solution is run while stirring into a solution of 50 parts of'the acid calciummagnesium salt of the natural ino'sitephos phoric acid obtained from plant seeds "in 1600 parts of water containing 16 parts by volume of chemically pure hydrochloric acid. To the suspension thus obtained,

is added a solution of ferric chlorid as feebly acid as possible, until the filtrate of a test portion is reddened with certainty by potassium sulfocyanid. The mixture is now filtered, the residueon the filter is washed and then dried, preferably 'by gentle heat-- ing in a vacuum. The product thus obtained contains about 7.5 per cent. of iron and about 6 per cent. of phosphorus.

Example II: 160 parts of egg albumin and 45 parts of neutral or amphoteric sodium salt of 'inositephosphoric acid are dissolved in 2500 parts of water with addition of 52 parts by volume of caustic soda lye of 30 per cent. strength. This solution is allowed to run .as quickly as possible while stirring into a solution of 70 parts of ferric chlorid (of per cent. strength) and 500 parts of common salt in 2000 parts of water heated to 80 to 90 C. 'The precipitate is filtered, well washed and dried. The prodnot thus obtained contains about 7.8 percent. of iron and 5 per cent. of phosphorus. Example HI: 100 parts of sesame flour,

or another vegetable material rich in albu- 100 min and phosphorus, are stirred with 800 parts of water with addition of 10 parts of caustic soda lye of 30 per cent. strength. A solution of 3.1 parts of oxalic acid in 100 parts of Water is added and the mixture fil- 105 the precipitate produced is then filtered. 110

. The dried product contains 13.8 per cent.

of iron and 4.2 per cent. of phosphorus. Instead of, as in the precedin Example III, extracting the vegetable a1 umin and such a manner that the albumin is first extracted, then-the phosphorus compound dissolved by means of dilute acid and the preci itation with iron salt performed after addition of the necessary proportion of the extracted vegetable albumin. So also ve etable albumin may be used which is not erived from the same parent material as that from which the phosphorus compound is.obtained.

The new products obtained as described from inositephosphoric acid constitute in a dry state yellowish-white owders, are insoluble in water and in 'fierent organic solvents, furnish on gentle heating with a sodium carbonate solutionof 1 per cent. a nearly clear red-brown solution, which contains the iron salt dissolved in colloidal form capable of being recognized by means of a solution of haematoxylm.

What I claim is z 1. A process for the manufacture of easlly resorbed iron salts ofthe assimilable phosalbumin, which pro ucts constitute in a dry powders, are insolustate yellowish-white ble in water and indiiferent organic solvents, furnish on gentle heating with a sodium carbonate solution of 1 per cent. a nearly clear red-brown solution, which contains the iron salt dissolved in colloidal form capable of being recognized by means of a solution of haematoxylin.

In witness whereof I have hereunto signed my name this 11th day of J une, 1912, in the presence of two subscribing witnesses.

ERNST PREISWERK. Witnesses:

GEO. Gmsono, AMAND BRAUN. 

